Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 9 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/07/2015   10:36:43   (   0.36,-135.18) (   0.66,-136.61)  163.06                80
 09/08/2015   10:15:17   (   0.36,-135.19) (  -0.32,-132.07)  354.87                80
 09/09/2015   22:37:12   (  -0.35,-135.22) (  -0.81,-137.39)  245.85                80
 09/10/2015   22:21:06   (  -0.35,-135.24) (   0.16,-132.84)  272.26                80
 09/12/2015   10:40:12   (   0.34,-135.24) (   1.00,-138.11)  328.21                80
 09/13/2015   10:21:27   (   0.34,-135.24) (  -0.04,-133.59)  189.42                80
 09/14/2015   22:43:21   (  -0.33,-135.27) (  -1.15,-138.89)  412.64                80
 09/15/2015   22:27:15   (  -0.33,-135.27) (  -0.11,-134.36)  104.99                80
 09/17/2015   10:46:22   (   0.32,-135.27) (   1.27,-139.63)  495.94                80
 09/18/2015   10:30:15   (   0.33,-135.27) (   0.29,-135.09)   20.92                80
 09/20/2015   22:30:44   (  -0.31,-135.27) (  -0.44,-135.86)   66.50                80